As we know that ,
Replace the sub-clause on bicycle or by foot :- on bicycle or foot
The correct sentence will be :-
My uncle goes to office on bicycle or foot.

Correct Option: B

As we know that ,
Replace the sub-clause on bicycle or by foot :- on bicycle or foot
The correct sentence will be :-
My uncle goes to office on bicycle or foot.
Therefore , option B will be required answer.

As we know that ,
Any able-bodied man is eligible for the job. is correct sentence

Correct Option: D

As we know that ,
Any able-bodied man is eligible for the job. is correct sentence
Hence , No improvement will be in above given sentence .So , option D is required answer .

As we know that ,
Replacing on the place of rumbled to :- screeched to
The correct sentence will be :-
The truck screeched to a halt and a man got out and ran.

Correct Option: B

As we know that ,
Replacing on the place of rumbled to :- screeched to
The correct sentence will be :-
The truck screeched to a halt and a man got out and ran.
Therefore , option B is correct answer .

As per the given above sentence , we can say that
eccentric means :- unusual, others have a different meaning
The correct sentence will be :-
She is very unusual woman.

Correct Option: A

As per the given above sentence , we can say that
eccentric means :- unusual, others have a different meaning
The correct sentence will be :-
She is very unusual woman.
Hence , option A will be required answer.

As per the given above sentence , we can say that
Replacing on the place of who was he and why was he :- who he was and why he was
The correct sentence will be :-
The Professor asked the intruder who he was and why he was in his lecture.

Correct Option: A

As per the given above sentence , we can say that
Replacing on the place of who was he and why was he :- who he was and why he was
The correct sentence will be :-
The Professor asked the intruder who he was and why he was in his lecture.
Thus , required answer will be option A .