Assertion (A): In a theodolite if the lower clamp is not properly clamped or the instrument is not firmly tightened on the tripod head, the error introduced is known as 'slip'.
Reason (R): If the shifting head is loose, the error 'slip' will be introduced
1
Both A and R are true and R is the correct explanation of A
2
Both A and R are true and R is not the correct explanation of A
3
A is true but R is false
4
A is false but R is true