The question is about the countries that have signed the treaty banning chemical weapons.

Option 1, which is the correct answer, indicates that the USA, Russia, India, Iran, and Israel are signatories to the treaty. Here, all these countries, except Iran and Israel, have ratified the treaty. However, Iran and Israel have only signed and not ratified it, which is a cause for further debate.

Option 2 mentions Iraq, Libya, India, Russia, and China. While three out of these five countries (India, Russia, and China) have ratified the treaty, Libya and Iraq did not initially sign the treaty but have since acceded to it.

Option 3 raises Brazil, Angola, North Korea, Pakistan, and the USA. Among these, Brazil, Angola, and the USA have ratified the treaty. North Korea and Pakistan, however, have neither signed nor ratified the treaty.

Option 4 includes Syria, Sri Lanka, Japan, Singapore, and France as signatories. All of these countries are indeed signatories, but Syria did not originally sign it. They have joined by accession, ratification or succession.

Just signing the treaty does not necessarily mean the country will comply with the treaty. The process of ratification, acceptance