What is the net loss of hydrogen for each full cycle of the proton proton chain? Explain

In a full cycle of proton proton chain reaction, a helium nucleus is formed by the four hydrogen nuclei and a huge amount of energy nearly 0.7 percent of the original mass is lost.

Explanation: The Sun gets its energy when hydrogen nuclei are fused together to form helium nuclei within the solar core. This hydrogen burning is described by a sequence of nuclear fusion reactions called the proton-proton chain. Overall, this chain successively fuses four protons together to make one helium nucleus.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

the answer is either b or c