Which of the following requirements form an essential element of 'course of employment' in cases of vicarious liability?
The servant's act must be:
1. Expressly or impliedly authorised by the master
2. Unauthorised manner of doing something which is authorised by the master.
3. Done to protect the interest of the master
4. Necessarily incidental to something which the servant is employed to do.
5. Done for the benefit of the master.
Select the correct answer using the given below:

A. 1, 2 and 3

B. 2, 3 and 5

C. 1, 2 and 4

D. 2, 4 and 5

Answer: Option C