Read the Assertion and the Reason that follows. Pick the correct response from the given alternatives.
A student observes that when curd is left out for a day, it becomes sourer. What can be two possible explanations for this observation?
| Assertion: | When curd is left out for a day, it becomes more sour. |
| Reason: | Lactobacillus bacteria in curd convert lactose into lactic acid, increasing acidity. |