railway RRB Technician Grade 1 Mock Test 2024 Mathematics Sets

निम्नलिखित में कौन-सा एक, शून्य समुच्चय है?

1
A = {x वास्तविक संख्या है: x > 1 और x < 1}
2
B = {x ∶ x + 3 = 3}
3
C = {Φ}
4
D = {x वास्तविक संख्या है: x ≥ 1 और x ≤ 1}
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