What is the value of

Correct option is A

Given:

​$$(k - \frac{1}{k})(k^2 + \frac{1}{k^2})(k^4 + \frac{1}{k^4})(k^8 + \frac{1}{k^8})(k^{16} + \frac{1}{k^{16}})(k^{32} + \frac{1}{k^{32}})$$

Solution: