The correct answer is A. 26.41 tonnes.
The hauling capacity of a locomotive is the maximum weight that it can pull. It is calculated by multiplying the load on each axle by the number of axles and the coefficient of friction. In this case, the load on each axle is 22 tonnes, there are 3 pairs of driving wheels, and the coefficient of friction is 0.2. Therefore, the hauling capacity is:
22 tonnes/axle * 3 pairs of axles * 0.2 = 26.41 tonnes
Option B is incorrect because it is the hauling capacity of a locomotive with a coefficient of friction of 0.1. Option C is incorrect because it is the hauling capacity of a locomotive with a coefficient of friction of 0.3. Option D is incorrect because it is the hauling capacity of a locomotive with a coefficient of friction of 0.4.