Who among the following suggested that life must have developed from simple inorganic molecule?

J.B.S. Haldane

The correct answer is Option (2)- J.B.S. Haldane

 Out of the choices you listed, the scientist who suggested that life must have developed from simple inorganic molecules is:

• J.B.S. Haldane

J.B.S. Haldane, a British-Indian scientist, was one of the early pioneers in the field of evolutionary biology and biochemistry. In his essay titled "The Origin of Life," published in 1929, Haldane proposed that life originated from simple inorganic molecules in a primordial soup. He hypothesized that the conditions on Earth early in its formation could have led to the spontaneous formation of complex organic molecules from simpler inorganic ones, eventually giving rise to the first living organisms.

Here's a short explanation of the others:

• Gregor Mendel: Known for his pioneering work on inheritance patterns in pea plants, but not directly related to the origin of life.
• Charles Darwin: Established the theory of evolution by natural selection, but not the origin of life itself.
• Stanley L. Miller: Famous for his 1953 experiment that demonstrated the creation of organic molecules from inorganic precursors under simulated early Earth conditions.