Explanation:

- Option 1: Moradabad

- Moradabad is located in the state of Uttar Pradesh, India.

- It is situated at a relatively low altitude on the Gangetic plains.

- Option 2: Patna

- Patna is the capital of the Indian state of Bihar.

- Located on the southern bank of the Ganges River, it is not known for high elevation.

- Option 3: Kolkata

- Kolkata is the capital of the West Bengal state in India.

- It is a low-lying city, very close to the sea level.

- Option 4: Ranikhet

- Ranikhet is a hill station in the Indian state of Uttarakhand.

- Located in the Himalayas, it is significantly higher in altitude compared to the other places listed.

Hence, the location with the highest altitude is Ranikhet.