Concept:India's first underwater metro is part of the Kolkata East-West Metro corridor, with a tunnel constructed below the Hooghly River.
Explanation:The trial run of the underwater metro was successfully conducted by Kolkata Metro Rail Corporation Limited (KMRCL).
The metro ran through a tunnel located
32 m below the water level of the Hooghly River.
Hence, Statement I is correct.
The underwater stretch of the tunnel is
520 m long.
This stretch is expected to be crossed by the metro in
45 seconds.
Therefore, Statement II is also correct.
Since both given statements are correct, the correct option is C.
Answer:Option C — Both I and II.