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

1. **Identify the Pattern**: Look at the first pair of letters in 'MATHEMATICS' -> 'LBSIDNZUHDR'.\n - M goes to L. That is 1 step back (-1).\n - A goes to B. That is 1 step forward (+1).\n - T goes to S. That is 1 step back (-1).\n - The pattern is established: **Alternating -1, +1** [37].\n\n2. **Start Solving 'CHEMISTRY'**: \n - First letter C. Apply (-1). C becomes **B**.\n - *Glance at Options*: Option (A) starts with D. Option (D) starts with D. Both are eliminated. We are left with (B) and (C).\n\n3. **Smart Elimination**: \n - Compare remaining options (B) and (C).\n - (B): BID**N**...\n - (C): BID**L**...\n - They differ at the **4th letter**. No need to calculate the 2nd or 3rd letter. Let's just calculate the 4th letter of CHEMISTRY.\n\n4. **Final Calculation**:\n - The 4th letter is 'M'.\n - The pattern for positions 1, 2, 3, 4 is (-1, +1, -1, **+1**).\n - Apply (+1) to M. M becomes **N**.\n - Option (B) has 'N'. Option (C) has 'L'. \n - Therefore, Option (B) is the correct answer.