23. The density

ρ of water of bulk modulus B at a depth y in the ocean is related to the density at surface ρ₀ by the relation

(a)  ρ= ρ_{0[1-(ρ0 gy/B)]}                       (b)  ρ= ρ_{0[1+(ρ0 gy/B)]}

(c)  ρ= ρ_{0[1+(B/ρ0 hgy)]}                      (d)  ρ= ρ_{0[1-(B/ρ0 gy)]}

Answer-b