Figure (13-Q3) shows a siphon. The liquid shown is water. The press...

Figure (13-Q3) shows a siphon. The liquid shown is water. The pressure difference \( P_{B}-P_{A} \) between the points \( A \) and \( B \) is
(a) \( 400 \mathrm{~N} \mathrm{~m}^{-2} \)
(b) \( 3000 \mathrm{~N} \mathrm{~m}{ }^{-2} \)
(c) \( 1000 \mathrm{~N} \mathrm{~m} \)
(d) zero.