A long horizontal belt is moving from left to right with a uniform speed of $2 \mathrm{m}/\mathrm{s}$. There are two ink marks $A$ and $B$ on the belt $60 \mathrm{m}$ apart. An insect runs on the belt to and fro between $A$ and $B$ such that its speed relative to belt is constant and equals $4 \mathrm{m}/\mathrm{s}$, if $A$ lies to the left of $B$, then

Time taken by insect to travel from $A$ to $B$ is more than the time taken by it to travel from $B$ to $A$.

Time taken by insect to travel from $A$ to $B$ and time taken by it to travel from $B$ to $A$ are equal.

None of the above

Time taken by insect to travel from $A$ to $B$ is less than the time taken by it to travel from $B$ to $A$.