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ഒറ്റയാൻ ഏത് ? 61,71,41,91

A61

B71

C41

D91

Answer:

D. 91

Read Explanation:

91 is not a prime number


Related Questions:

Which of the following do not belong to the group :
Select the odd letters from the given alternatives
കൂട്ടത്തിൽ പെടാത്തത് ഏത് ?
Based on the English alphabetical order, three of the following four letter-clusters are alike in a certain way and thus form a group. Which letter-cluster DOES NOT belong to that group? (Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)
കൂട്ടത്തിൽ പെടാത്തത് ആര് ? 31, 41, 51, 61