Step 1: Understanding Section 6 of the Indian Evidence Act.
Section 6 of the Indian Evidence Act deals with the relevancy of facts that are part of the same transaction. If A was part of an armed insurrection, even if he was not present at every event, the entire transaction of waging war is relevant.
Step 2: Explanation of the options.
- (a) Section 12: Deals with the relevancy of the judgments in cases regarding marriage, which is not applicable here.
- (b) Section 6: This is the correct section, as it deals with facts forming part of the same transaction, which is relevant in this case.
- (c) Section 5: Deals with the relevancy of facts but not as part of the same transaction.
- (d) Section 9: Deals with the relevancy of facts related to the motive, preparation, and conduct of a crime, but does not cover the entire transaction.
Step 3: Conclusion.
Thus, the correct answer is (b) Section 6.