Hi Bimal. Thanks for your query and using Health Care Magic
Based on your symptoms, its clear that you cannot move you left leg and cannot use your right hand. The left and right side of the body is controlled by different areas in the brain. The normal MRI
which you are mentioning is likely of the Brain.
You will need further evaluation to find ut the root cause of your problem.
This will include,
1. MRI of whole spine,
Conduction studies of both upper and lower limbs
With this, we can 100 % pinpoint to the cause of our problem. Only then a definitive treatment can be advised.
Do consult your neurologist
for these tests.