Consider the following statements regarding baseline measurements :
1. Very precise measurement can be done only on densely cloudy days or at night.
2. Error due to application of non - standardized pull on the tape can be either cumulative or compensating type.
3. Intermediate obstruction in the measurement on baselines can be cleared by erecting towers.
Of these statements
1
1, 2 and 3 are correct
2
1 and 2 are correct
3
1 and 3 are correct
4
2 and 3 are correct