Convert 150 seconds into minutes and seconds, and select the correct option.

$$150 \text{ seconds} - (2 \text{ minutes} \times 60 \text{ seconds/minute}) = 150 \text{ seconds} - 120 \text{ seconds} = 30 \text{ seconds}$$

So, 150 seconds is equal to 2 minutes and 30 seconds.

Comparing this to the given options:

a) 3 mins 40 secs

b) 4 mins 20 secs

c) 2 mins 30 secs

The correct option is c.

The final answer is $\boxed{\text{c) 2 mins 30 secs}}$.