The correct answer is (d), Pindari.
The Alaknanda River is a tributary of the Ganges River. It originates in the Garhwal Himalayas in the Indian state of Uttarakhand. The Alaknanda River is formed by the confluence of the Dhauliganga and Nandakini rivers. The Alaknanda River flows through the Garhwal Himalayas and the Kumaon Himalayas before joining the Bhagirathi River to form the Ganges River.
The Nandakini River is a tributary of the Alaknanda River. It originates in the Garhwal Himalayas in the Indian state of Uttarakhand. The Nandakini River flows through the Garhwal Himalayas before joining the Alaknanda River.
The Dhauliganga River is a tributary of the Alaknanda River. It originates in the Garhwal Himalayas in the Indian state of Uttarakhand. The Dhauliganga River flows through the Garhwal Himalayas before joining the Alaknanda River.
The Pindari River is a tributary of the Kali River. It originates in the Kumaon Himalayas in the Indian state of Uttarakhand. The Pindari River flows through the Kumaon Himalayas before joining the Kali River.
Therefore, the Pindari River is not a left bank tributary of the Alaknanda River.