A. Unidirectional
B. Bidirectional
C. Either (a) or (b)
D. Non directional
Correct Answer: Unidirectional ✔
Last Updated: October 20, 2018
A. Unidirectional
B. Bidirectional
C. Either (a) or (b)
D. Non directional
Correct Answer: Unidirectional ✔
Last Updated: October 20, 2018