Subject to any provisions in respect thereof set forth in its articles of incorporation, a corporation may create and issue, whether or not in connection with the issuance and sale of any of its shares or other securities, rights or options entitling the holders thereof to purchase from the corporation shares of any class or classes. Such rights or options shall be evidenced in the manner approved by the board of directors and, subject to the provisions of the articles of incorporation, shall set forth the terms upon which, the time or times within which and the price or prices at which the shares may be purchased from the corporation upon the exercise of any such right or option. In the absence of fraud in the transaction, the judgment of the board of directors as to the adequacy of the consideration received for the rights or options is conclusive.