Alternating Current Part 1

We know that, at very high frequency capacitive reactance becomes negligible i.e. short circuit (SC) and inductive reactance becomes very large i.e. open circuit (OC).
i.e. XC→0 and XL→∞.
Now, the circuit can be rearranged as shown in figure. Hence, equivalent resistance,
Req=1+

2×2

2+2

=2Ω
Thus, correct answer is 2.