Cantor Sequence

Computer Science Level 3

Consider the sequence $\{ 1/1, 1/2, 2/1, 3/1, 2/2, 1/3, \ldots\}$ as shown above.

What is the $3974^\text{th}$ term?

\frac{30}{60}

\frac{30}{61}

\frac{31}{58}

\frac{31}{59}

\frac{32}{58}

\frac{33}{57}