Statement 1: x8y9<0 As x8 will be always positive ⇒y9<0 (product of +ve and -ve is negative) ⇒y<0 Statement: 2 x9y10<0 As y10 will be always positive ⇒x9<0 (product of +ve and -ve is negative) ⇒x<0 From 1&2, we can say x<0&y<0 Since, product of -ve and -ve is positive ⇒xy>0 ∴ Both Statement-1 and Statement-2 are sufficient to answer the question