If phase angle of open loop transfer function becomes - 180¬∞ at frequency œâ1, then gain margin is equal to

If phase angle of open loop transfer function becomes - 180¬∞ at fr

1.	If phase angle of open loop transfer function becomes - 180¬∞ at frequency œâ1, then gain margin is equal to
A.	\|G(jœâ1)\|
B.
Answer» C.