CBSE 2026 · Region 5 · Set 1 · Q19 · 1 mark
Assertion (A) : A relation R on the set $\displaystyle \{1,2,3\}$ defined as $\displaystyle \mathrm{R}=\{(1,1),(1,2),(2,1),(2,2),(3,3)\}$ is an equivalence relation.
Reason (R) : A relation that is reflexive, symmetric and transitive is an equivalence relation.
Official answer
From CBSE’s own marking scheme for this paper.
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Relations and FunctionsTypes of RelationsUnderstandassertion_reasoneasy
More from Relations and Functions
- Let f: A → B be defined by f(x)=(x-2)/(x-3), where A=R- 3 and B=R- 1. Discuss the bijectivity of the function.2025 · asked 3×
- If f(x)= x + x-1, then which of the following is correct?2025 · asked 3×
- A class-room teacher is keen to assess the learning of her students the concept of "relations" taught to…2025 · asked 3×
- If f: N → W is defined as f(n)=,. then f is:2025 · asked 3×
- If f(x)=-2 x^8, then the correct statement is:2025 · asked 3×
- A function f(x)= 1-x+ x is:2024 · asked 3×
- A school is organizing a debate competition with participants as speakers S= S 1, S 2, S 3, S 4 and these are…2025 · asked 3×
- For real x, let f(x)=x^3+5 x+1. Then:2025 · asked 3×
CBSE Class 12 Mathematics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.