The correct answer is $\boxed{\text{B) Rs. 14}}$.
The Halsey premium plan is a type of incentive wage plan in which workers are paid a base rate for their time worked, plus a bonus for any time they work below the standard time. The bonus is typically a percentage of the time saved.
In this case, the standard time for the job is 8 hours, the actual time taken is 6 hours, and the time rate is Rs 2 per hour. The bonus is therefore 2/8 * 2 = Rs 1 per hour. The total wages for the job are therefore 6 * 2 + 1 = Rs 14.
Option A is incorrect because it is the time rate only. Option C is incorrect because it is the time rate plus the bonus for the first hour only. Option D is incorrect because it is the time rate plus the bonus for the entire job.