With reference to physical capital in Indian economy, consider the following pairs : Items | Category 1. Farmer's plough | Working capital 2. Computer | Fixed capital 3. Yarn used by the weaver | Fixed capital 4. Petrol | Working capital How many of the above pairs are correctly matched ?

1. (a)Only one
2. (b)Only two
3. (c)Only three
4. (d)All four