In a code language 'MATHEMATICS' is written as 'LBSIDNZUHDR'. How is CHEMISTRY' written in that code language?

Correct Option (3)

The coding scheme follows an alternating pattern of subtracting 1 and adding 1 to the alphabetical position of each letter. This sequence begins with a subtraction of 1.

• For the word 'MATHEMATICS' coded as 'LBSIDNZUHDR':
• M (13) - 1 = L (12)
• A (1) + 1 = B (2)
• T (20) - 1 = S (19)
• H (8) + 1 = I (9)
• E (5) - 1 = D (4)
• M (13) + 1 = N (14)
• A (1) - 1 = Z (26)
• T (20) + 1 = U (21)
• I (9) - 1 = H (8)
• C (3) + 1 = D (4)
• S (19) - 1 = R (18)

Applying this identical pattern to the word 'CHEMISTRY':

• C (3) - 1 = B (2)
• H (8) + 1 = I (9)
• E (5) - 1 = D (4)
• M (13) + 1 = N (14)
• I (9) - 1 = H (8)
• S (19) + 1 = T (20)
• T (20) - 1 = S (19)
• R (18) + 1 = S (19)
• Y (25) - 1 = X (24)

Thus, 'CHEMISTRY' is encoded as 'BIDNHTSSX'.

Incorrect Options:

Options 1, 2, and 4 are incorrect because they do not adhere to the established alternating -1, +1 coding pattern derived from the given example. Any deviation from this specific sequential transformation results in an invalid coded word for 'CHEMISTRY'.