CAT Exam Model Paper 5 with solutions for free online practice

Let us consider all the options one by one.
(i) If statement I is true then Sudip must be disguised as S5 and his total score in all three subjects must be 127.
Subsequently from Case I and Case III, Himanshu can be disguised as either S3 or S4. Hence, Himanshu's total score will be either 121 or 144.
Therefore we cannot say that statement II is definitely true.
(ii) If statement II is true then Himanshu, as his score cannot be the lowest, must be disguised as S4.
Now, Sudip must be disguised as either S3 or S5.
Hence, Sudip’s score in chemistry is either 43 or 36.
Therefore we cannot say that statement I is definitely true.
(iii) If statement I is false then Sudip must be disguised as either S3 or S4.
Now, if Sudip has been disguised as S3 then Himanshu must be S4 (Case IV) and his total score (144) will be more than that of Sudip (121).
But if Sudip has been disguised as S4 then Himanshu must be S3 (Case II) and his total score (121) will be less than that of Sudip (144).
Therefore we cannot say that statement II is definitely false.