The correct options are
A ![](https://infinitestudent-migration-images.s3-us-west-2.amazonaws.com/_4b25d1c6078ed2238b26381024448dbe650616b320160711-4702-juze94.png)
=
C ![](https://infinitestudent-migration-images.s3-us-west-2.amazonaws.com/_e804e4b3242b4dd245bc1fa1851ff4464739106f20160711-4702-119ztqh.png)
=
![](https://infinitestudent-migration-images.s3-us-west-2.amazonaws.com/_2864287fa0ff250a27a389ec6d84c60bc763264b20160711-4702-lltgc2.png)
Negative of a vector
→u is a vector having the same magnitude but the opposite direction.
Here
∣∣→a∣∣=∣∣∣→b∣∣∣ But
→a is in opposite direction of
→b So
→a=→−b Similarly
∣∣→c∣∣=∣∣∣→d∣∣∣ So
→c=→−d →a and
→c are not in opposite directions. So
→a≠→−c Same is the case with
→b and →d