Option 1: Both the statements are individually true and statement II is the correct explanation of statement I.

Option 2: Both the statements are individually true but statement II is not the correct explanation of statement I.

Option 3: Statement I is true but statement II is false.

Option 4: Statement I is false but statement II is true.

According to the given statements, statement I states that adjournment is a short recess within the session of Parliament ordered by the Presiding Officer. This statement is true. Adjournment refers to a temporary suspension of the proceedings of the House. Similarly, statement II states that when the Presiding Officer adjourns the House without fixing any date or time of the next meeting, it is known as adjournment sine die. This statement is also true. Adjournment sine die means the termination of the session of Parliament without a fixed date for the next meeting. However, statement II is not an explanation of statement I. Therefore, option 2 is the correct answer.

In summary, both statements are true, but the second statement does not provide the correct explanation of the first statement.