Which is a base?

1) substance c is formed from the reaction of an acid and a base.

2) substance a gives off h+ ions that combine with oh– ions when dissolved in water.

3) substance b gives off oh– ions that combine with h+ ions when dissolved in water.

2. if it ends with OH and gives off positive ions then it's a base

Your answer is c. explanation: plasma  is the fourth state of matter, derived from the gaseous state of matter.  plasma  can contain free  electrons  and/or  ions. while  plasma is never neutral, it can either be positively or negatively charged.  gases, however, are electrically neutral.