Explanation:

In this question, we are asked to identify the person who is not disqualified from contracting. Let's analyze each option:

a) Minor: A minor is a person who has not yet reached the age of majority, which is typically 18 years old. In most jurisdictions, minors are not considered legally competent to enter into contracts, and any contract they enter into is voidable at their option. Therefore, minors are disqualified from contracting.

b) Married woman: Previously, married women were considered to be under the legal authority of their husbands and were not able to enter into contracts without their husband's permission. However, modern laws have changed, and married women are now considered to have the same legal capacity as unmarried women or men. Therefore, married women are not disqualified from contracting.

c) Lunatic: A lunatic, also known as a person of unsound mind or mentally ill, may be disqualified from contracting. Contracts entered into by a lunatic may be voidable at their option, depending on the jurisdiction and the specific circumstances. However, it is important to note that the determination of mental capacity and the legal consequences vary in different legal systems.

d) Insolvent: An insolvent person is someone who is unable to pay their debts as they become due. In most jurisdictions, an insolvent person is not disqualified from contracting. However, if the person's insolvency is known to the other party at the time of contracting, it may affect the enforceability of the contract.

Conclusion:

Among the options given, the married woman is not disqualified from contracting. This is because modern laws recognize married women as having the same legal capacity as unmarried women or men.