`3%` solution of glucose is isotonic with `1%` solution of non-volatile non-electrolyte solute. The molecular mass of the solute would be
a.`180`, b.`160`,c.`120`, d.`60`

Explanation

To solve the problem, we need to determine the molecular mass of the non-volatile non-electrolyte solute that makes a 1% solution isotonic with a 3% solution of glucose.

### Step-by-step Solution:

1. **Understanding Isotonic Solutions**:
- Two solutions are isotonic when they have the same osmotic pressure. This means that the number of solute particles per unit volume is the same in both solutions.

2. **Calculate the Amount of Solute in Each Solution**:
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