Correct option is A
Explanation-
Option a : CD1- Antigen-presenting proteins that present antigenic peptides to T-cell receptors on NKT cells.
Incorrect
CD1 molecules present lipid and glycolipid antigens, not peptides, to NKT cells. The mention of "peptides" is incorrect.
Option b : CD8 - Thymic differentiation marker for T cells.
Correct
CD8 is expressed on cytotoxic T cells (CD8+ T cells) and acts as a co-receptor during thymic differentiation.
Option c : CD11a - A membrane glycoprotein that provides cell-cell adhesion by interaction with ICAM1.
Correct
CD11a is part of LFA-1 (lymphocyte function-associated antigen-1), which interacts with ICAM-1 for leukocyte adhesion.
Option d : CD14 - Activates innate immune responses by transferring LPS-LBP complex to TLR4.
Correct
CD14 binds the LPS-LBP complex and facilitates its recognition by TLR4 on innate immune cells.
Since the option a is incorrect among all the other options that makes it a correct answer.
Because CD1 presents lipids/glycolipids, not peptides, to NKT cells.
