The first action spectrum of photosynthesis was described by $\mathrm{\_\_A\_\_}$using $\mathrm{\_\_B\_\_}$and $\mathrm{\_\_C\_\_}.$
 

	A	B	C
1.	T.W Engelmann	Cladophora	anaerobic bacteria
2.	T.W Engelmann	Cladophora	aerobic bacteria.
3.	Jan Ingenhousz	Spirogyra	aerobic bacteria.
4.	Julius von Sachs	Chlorella	anaerobic bacteria.

• A

  1

• B

  2

• C

  3

• D

  4