Answer: B

Explanation:

India has a land border of about 15,200 km and a sea coastline of 7,516.6 km along with the Andaman and Nicobar Islands and the Lakshadweep group. Gujarat has the longest coastline among the various coastal states of India. Hence, option (b) is the correct answer.

Answer: A

Explanation:

Srinagar, the capital of Jammu and Kashmir, is situated on the banks of the Jhelum River. Dal Lake is an interesting natural place in Srinagar. Dal Lake of Srinagar, which is an interesting natural site, is fed by the Jhelum River. Jhelum River is the main source of water for irrigation in Kashmir. Hence, statement 1 is correct

In the Kashmir valley, the Jhelum river flows in its young age, however, in the development of the river landform, it forms specific shapes - meanders which are formed in the mature age. Hence, statement 2 is incorrect

Answer: A

Explanation:

Krishna is a river flowing in India. This river originates from Mahabaleshwar mountain in the Western Ghats. It flows in the south-eastern states of Maharashtra, Karnataka, Telangana, Andhra Pradesh and falls into the Bay of Bengal. Koyna, Tungabhadra and Bhima are its main tributaries.

The Kaveri River originates from the Brahmagiri Hills in the Kodagu district of Karnataka. Kaveri river flows in the south-east and falls into the Bay of Bengal. Kabini, Bhavani and Amravati are its important tributaries.

Godavari is the largest peninsular river system. It is known as Dakshin Ganga. It originates from Nashik district in Maharashtra and discharges its waters into the Bay of Bengal. Its main tributaries are Penganga, Indravati, Pranahita and Manjra.

The Narmada River originates from the western side of the Amarkantak Plateau at a height of about 1,057 meters. Flowing through a fault valley between the Satpura ranges in the south and the Vindhyachal ranges in the north, it forms a beautiful Mahakhaddu in marble rocks and a smoking waterfall near Jabalpur. After flowing for a distance of about 1.312 kilometers, it joins the Arabian Sea south of Bharuch and forms a 27 kilometer long estuary. Sardar Sarovar Project has been built on this river. Hence, option (a) is correct.

Answer: C

Explanation:

The two important landforms of the Lesser Himalayas are Shivalik and Doon. Some important Doon located here include Chandigarh-Kalka Doon, Nalagarh Doon, Dehradun, Harike Doon and Kota Doon. Among these, Dehradun is the largest valley, whose length is 35 to 45 kilometers and width is 22 to 25 kilometers. Hence, option (c) is correct.

Answer: D

Explanation:

To the west of the Darjeeling and Sikkim Himalayas are the Nepal Himalayas and to the east are the Bhutan Himalayas. This is a small but very important part of the Himalayas. The fast-flowing Tista river flows here and high peaks and deep valleys like Kanchenjunga are found. Hence, statements 1, 2 and 3 are correct.

On the higher peaks of these mountains, there is the Lepcha tribe and in the southern part (especially the Darjeeling Himalayas) there is a mixed population, which includes Nepali, Bengali and Central Indian tribes. Hence, statement 4 is correct.