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A. Not a Lattice
B. Lattice but not a complemented Lattice
C. A complemented Lattice
D. A Boolean Algebra

is it D) boolean algebra
Its a chain. Chain doesnt have a complement. So, answer B
@Sushant
Can you please make hasse diagram?

I, myself is getting following hasse diagram, please let me know if it's correct? it's lattice but not complemented lattice

selected
Perfect.
why not complmened lattice? @vijay
LUB of 0,1 and 1,0 is 1,0
GLB of 0,1 and 1,0 is 0,1
@anusha

I mean complement of 1,0?
@Vijay Thakur  No need to show arrows. Its one way relation for POSET. In fact we never show arrows in Hasse diag.